Fingerease Guitar String Lubricant eliminates drag from strings and back of neck. Finger-ease Guitar String Lubricant is the original and professional's choice. It has been the leading string lubricant for over 35 years - reducing finger tenderness, stopping string talk, extending the life of strings by cleaning and protecting them, and smoothing finger callouses. It is effective on steel-wound, nylon, or gut strings, and is frequently used on other stringed instruments